The coordination and unification of the petroleum policies of its members is one of the main objectives of

The Organisation of the Petroleum Exporting Countries (OPEC) is the international organisation whose main objective is the coordination and unification of the petroleum policies of its member countries. OPEC was founded in 1960 in Baghdad, Iraq, by five founding members: Iran, Iraq, Kuwait, Saudi Arabia, and Venezuela. Nigeria joined OPEC in 1971.

OPEC's core mission is to ensure the stabilisation of oil markets, secure an efficient and regular supply of petroleum to consumers, provide a steady income to producers, and ensure a fair return on capital for those investing in the petroleum industry. It achieves this by coordinating production quotas and pricing policies among member states.

The other organisations serve entirely different purposes. UNICEF (United Nations Children's Fund) focuses on children's welfare, health, and education worldwide. ECOWAS (Economic Community of West African States) is a regional organisation promoting economic integration and cooperation among West African nations. UNO (United Nations Organisation) is a global body focused on maintaining international peace and security, promoting human rights, and fostering social and economic development.